A comparative study of two adaptive equalizers for mobile radio

Weifeng Huang, Theodore S. Rappaport

Research output: Chapter in Book/Report/Conference proceedingConference contribution


Adaptive equalization techniques designed to improve bit error rates (BERs) degraded by multipath propagation in mobile communication systems are addressed. Two kinds of equalizers are used in a simulation: the adaptive lattice decision feedback equalizer (L-DFE) and maximum-likelihood sequence estimation (MLSE). RLS (recursive-least-squares) algorithms are used to update the equalizers. The choices are based on the fact that a DFE has little noise enhancement and a RLS algorithm converges fast and has good tracking capability. The sensitivities of these equalizers to receiver velocity and signal-to-noise ratio are tested for a two-ray multipath channel where the ratio of powers of the rays can vary. Results show that these two kinds of equalizers have similar performances.

Original languageEnglish (US)
Title of host publication41 IEEE Veh Technol Conf
PublisherPubl by IEEE
Number of pages5
ISBN (Print)0879425822
StatePublished - May 1991
Event41st IEEE Vehicular Technology Conference - St. Louis, MO, USA
Duration: May 19 1991May 22 1991

Publication series

NameIEEE Vehicular Technology Conference
ISSN (Print)0740-0551


Other41st IEEE Vehicular Technology Conference
CitySt. Louis, MO, USA

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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